Cal Mag Deficiency week 6 flower?

singlecoiled

singlecoiled

Well-Known Member
Hi all, I'm not new to seeing my plants do this around week 6 flower. Is this a Magnesium, Calcium, or other deficiency?

I'm not surpised, I'm using RO water very little cal mag and 1/2 doses of Dynagrow Foliage Pro, as well as a few drops of bloom and mag pro--I'm barely using bloom nutes this grow.

Anyway, if you know of a quick fix to prevent this from getting worse, I'd appreciate it. I have Sensi Cal mag and (4-0-0) and hate giving too much nitrogen this late in flower, but I can use it if you think it will work. Flush time? Too much nitrogen from the Foliage Pro? Epson Salts?

Quick info:

Start Week 6 Flower
Northern Lights Fem
Fox Farm Happy Frog/Perlite/Worm castings
Watering PH 6.5-7.5-- Runnoff PH around 6.5
7 gallon air pot
Spiderfarmer SF-1000 at 15 inches, full power.

_DSC4903.JPGcDSC4930.jpg
 
Last edited:
visajoe1

visajoe1

Well-Known Member
using all of these? if so, what is ec? too much of everything npk
cal mag and 1/2 doses of Dynagrow Foliage Pro, as well as a few drops of bloom and mag pro

is tap water unusable? unless tap is unusable, no need for RO in soil, which would also negate the calmag

how many days between watering/feeding?

to me, based on description and pics, looks like lockout is setting in. id go with tap water only for a couple cycles, assuming its usable, no need to ph it. water with appropriate runoff.
 
singlecoiled

singlecoiled

Well-Known Member
visajoe1 said:
using all of these? if so, what is ec? too much of everything npk
cal mag and 1/2 doses of Dynagrow Foliage Pro, as well as a few drops of bloom and mag pro

is tap water unusable? unless tap is unusable, no need for RO in soil, which would also negate the calmag

how many days between watering/feeding?

to me, based on description and pics, looks like lockout is setting in. id go with tap water only for a couple cycles, assuming its usable, no need to ph it. water with appropriate runoff.
Click to expand...

Good stuff, thanks for the tips. You read my mind, I was thinking tap water might be a good idea now that I only have a month to go (give or take). Yes, I think your right, lockout is setting in just as it has for my past three grows. Week 6 is where I fail, hard everytime and nothing seems to get me through safely !

This grow, I've kept it very simple and I am following the Dynagrow feed chart at half strength to 3/4.... Fed around once per week or every two waterings, Watering is around twice a week, 3 days average, I water when the pot feels light and my drainage is very good, I get some runnoff not too much though. Runoff PH is around 6.5-70

I've read that bloom nutrients cause more harm than good, so No Open Sesame, Cha-Ching, Beastie bloomz, this grow.... Just Dynagro Foliage Pro, Bloom (barely used) Mag Pro and Protekt. I have Cal Mag but am using only a small amount....

The Dynagrow feeding schedule below:

(per gallon)
Protekt- 5ML (I feed 2.5 ML)
Foliage Pro- 2.5 ML (I feed around 1.75-2.0 ML)
Bloom- 2.5 ML ( I've only used once, week 5 flower sparingly around 1.75 ML)
Mag Pro- 1.25- (I give just a few drops, I'm talking 1/64th of a tsp per gallon)
Sensi Cal Mag- 1/64th tsp plain waterings... (barely any at all)

Week 6 Flower The Dyna Grow schedule drops the foliage pro and bumps Bloom to 5 ML.

I thought the high use of bloom nutrients caused my problems last grow, so I'm taking it really easy this time. But here I am again, ready to watch my plant start to turn yellow and brown.

No, EC meter yet unfortunately, thats on my list of things to do. I PH using drops and am watering with water in the 6.5 -7.0 range. I'm trying hard this grow to use as little PH up and Down and am hoping the soil buffers the PH to a healthy range.
 
visajoe1

visajoe1

Well-Known Member
the total ML's dont look excessive, but i suspect the elemental breakdown isnt where we want it, causing our issues. Something(s) are preventing other minerals from being accessed. When things go sideways for me, my default is the lucas formula. Balanced feed is what we want generally speaking.

with what you have, the bloom and protekt should be closer to where we want to be. i see their chart includes foliage pro, mag pro, and zyme, but we can do without all of these. if mg is needed, epsom salt is less expensive.

the chart says 10ml bloom and 5ml protekt at week 6. i dont see a problem with that based on their npk's. can probably just run these all the way through. may need to adjust EC up/down depending on hunger level. this should get you in the ballpark tho. no need for the other additives

runoff should be 10-25%, helps prevent salt accumulation. overall, you're really close, hang in there! best of luck
 
singlecoiled

singlecoiled

Well-Known Member
visajoe1 said:
the total ML's dont look excessive, but i suspect the elemental breakdown isnt where we want it, causing our issues. Something(s) are preventing other minerals from being accessed. When things go sideways for me, my default is the lucas formula. Balanced feed is what we want generally speaking.

with what you have, the bloom and protekt should be closer to where we want to be. i see their chart includes foliage pro, mag pro, and zyme, but we can do without all of these. if mg is needed, epsom salt is less expensive.

the chart says 10ml bloom and 5ml protekt at week 6. i dont see a problem with that based on their npk's. can probably just run these all the way through. may need to adjust EC up/down depending on hunger level. this should get you in the ballpark tho. no need for the other additives

runoff should be 10-25%, helps prevent salt accumulation. overall, you're really close, hang in there! best of luck
Click to expand...

Thanks so much, this is my third attempt at growing this strain and this happens like clockwork week 6 of flower no matter what direction I take. Any chance its just the strain doing its thing late flower?

I've run this grow completely different from my previous attempts and after reading advice from many, Uncle Ben, The President of Dynagrow, and others, was planning to either toss the bloom nutrients in the trash or use them very lightly. I planned to run foliage pro and bloom together at .5 to .75 all the way through. There are a lot of mixed signals in this hobby, Bloom nutrients are one of them. Half the people say to use them, half say they do more harm then good. Now here I am chasing my tail and running in circles -----

Anyway, thanks so much for the tips, I think your right about Something(s) are preventing other minerals from being accessed. Maybe I should give her a good flush (Again, another topic people cant seem to come together on) but if I have lockout due to salt build up., excess nitrogen etc... Wouldnt a flush help me get reset without stabbing in the dark ?

Here is the chart from Dyna grow that I've been using as a guide. I've been mainly running Foliage Pro at around 1.0 - 1.25 ML per half gallon watering with Protekt and thats it. Anything else added was such a small doseage, I wouldnt count it at all. (Mag Pro and Calmag)


Screenshot (2).png
 
singlecoiled

singlecoiled

Well-Known Member
visajoe1 said:
using all of these? if so, what is ec? too much of everything npk
cal mag and 1/2 doses of Dynagrow Foliage Pro, as well as a few drops of bloom and mag pro

is tap water unusable? unless tap is unusable, no need for RO in soil, which would also negate the calmag

how many days between watering/feeding?

to me, based on description and pics, looks like lockout is setting in. id go with tap water only for a couple cycles, assuming its usable, no need to ph it. water with appropriate runoff.
Click to expand...
Thanks for the tip, I'm planning to follow your lead here will water tonight using tap water. I'm tempted to flush the soil, but have decided against, so I'll probably let the water drain to runnoff a little more than usual. So, I'll water heavy, let it soak in and then add more water to see if I can get out any excess salts, nitrogen etc. Hate to do it, but I think it needs it-- a "mini" flush. ( hate flushing away the Mycos creatures, hopefully they keep doing their thing.)

The plant I'm growing is Northern Lights. Its supposed to be a quick flowering strain (they say) 7-9 weeks, but I normally let it go 65-75 days in flower. So, if I'm week 6.5 of flower with a strain that is quick flowering is it possible that this is normal Senescence setting in? This is my third try with this strain, everyone was grown differently, different nutrients, different watering, different soil and pots, yet week 6 always does this for me like clockwork... I'm starting to wonder if I'm worrying too much about something that is normal..
 
visajoe1

visajoe1

Well-Known Member
Its rare to have a strain finish in 7 weeks, some exist. Not sure if NL is one. Most indica/hybrid strains can go 9+ weeks easily, sativas 12+.
what we're looking for now is the damage to slow down and stop spreading, perhaps even heal a bit. lets get this one over the finish line, reflect on what was different from prior grows (positive changes) and build on that.

what i can tell you, npk levels have dramatic effect on how the flower actually develops. too much N, for example, flowers will be more "leafy". too much P can cause burn/lockout and poor taste. to ensure its fun, all strains are different! haha. but most are within certain ranges.
fed differently plants can flower entirely different from one another, even if they're clones from same mother.

imo, you're closer than you think. hang in there.

below is their 2022 chart with my recommendations. may need to up the bloom early in flower. K might still be a bit low, but we're in the ballpark
also attached for reference

1672878192912.png
 

Attachments

singlecoiled

singlecoiled

Well-Known Member
visajoe1 said:
Its rare to have a strain finish in 7 weeks, some exist. Not sure if NL is one. Most indica/hybrid strains can go 9+ weeks easily, sativas 12+.
what we're looking for now is the damage to slow down and stop spreading, perhaps even heal a bit. lets get this one over the finish line, reflect on what was different from prior grows (positive changes) and build on that.

what i can tell you, npk levels have dramatic effect on how the flower actually develops. too much N, for example, flowers will be more "leafy". too much P can cause burn/lockout and poor taste. to ensure its fun, all strains are different! haha. but most are within certain ranges.
fed differently plants can flower entirely different from one another, even if they're clones from same mother.

imo, you're closer than you think. hang in there.

below is their 2022 chart with my recommendations. may need to up the bloom early in flower. K might still be a bit low, but we're in the ballpark
also attached for reference

View attachment 5245030
Click to expand...
Its rare to have a strain finish in 7 weeks, some exist. Not sure if NL is one. Most indica/hybrid strains can go 9+ weeks easily, sativas 12+.

No argument here, I'm on my third grow with this strain and It seems to take at 9 weeks to finish for me, but here is a growing guide from ILGM for Northern Lights.

Thanks for the chart, your numbers are double what my Dynagrow chart says (posted above) and I'm feeding 1/2- 3/4 the recommended dose. ( 5 ML p er gallon, I'm feeding 2ML)

So I guess what I'm wondering is if my yellowing of leaves is normal considering it's getting close to the harvest window. My bet is that I'm having some type of PH problem late flower causing lockout --- (mixed with senescence normal late flower).... The thing that really pisses me off how difficult (or close to impossible) it is to check soil PH in the root zone. I really need to know the soil PH instead of guessing. I'm measuring watering PH and comparing runoff PH but you and I know this is not accurate. The more grows I get under my belt, the more confused I'm becoming.



(From ILGM)

Feeding Northern Lights Plants
Visit our nutrient section to get the right plant food for every grow stage.

We recommend giving your plants:

Flowering and Yield
The flowering time is, on average, 7 to 9 weeks often falling on the shorter side-so keep an eye out. Outdoor growers will harvest in mid-October at the latest.
 
B

Blackhammer56

Active Member
I use 7ml of cal/mag per gallon, and i'm using Athena Pro but may switch to something else in flower. I've heard that it's great for veg but the it in flower don't expect any terps!
 
B

Blackhammer56

Active Member
check your roots, weeks 6, and 7 should be the 2 weeks you bump your EC up! something is definitely wrong. how's your temps? Buds looks airy t be at weeks 6. I hope it works out for you, if you had a EC meter you could test whatever medium you're using. They are lifesavers if you're trying to dial things in. In fact it's a must have. I love my Truncheon 2.
 
B

Blackhammer56

Active Member
singlecoiled said:
Its rare to have a strain finish in 7 weeks, some exist. Not sure if NL is one. Most indica/hybrid strains can go 9+ weeks easily, sativas 12+.

No argument here, I'm on my third grow with this strain and It seems to take at 9 weeks to finish for me, but here is a growing guide from ILGM for Northern Lights.

Thanks for the chart, your numbers are double what my Dynagrow chart says (posted above) and I'm feeding 1/2- 3/4 the recommended dose. ( 5 ML p er gallon, I'm feeding 2ML)

So I guess what I'm wondering is if my yellowing of leaves is normal considering it's getting close to the harvest window. My bet is that I'm having some type of PH problem late flower causing lockout --- (mixed with senescence normal late flower).... The thing that really pisses me off how difficult (or close to impossible) it is to check soil PH in the root zone. I really need to know the soil PH instead of guessing. I'm measuring watering PH and comparing runoff PH but you and I know this is not accurate. The more grows I get under my belt, the more confused I'm becoming.



(From ILGM)

Feeding Northern Lights Plants
Visit our nutrient section to get the right plant food for every grow stage.

We recommend giving your plants:

Flowering and Yield
The flowering time is, on average, 7 to 9 weeks often falling on the shorter side-so keep an eye out. Outdoor growers will harvest in mid-October at the latest.
Click to expand...
 
singlecoiled

singlecoiled

Well-Known Member
Blackhammer56 said:
You're over thinking it. They have soil ph testers bluelab. Do you think it's more acidic or alkaline?
Click to expand...
Well, all those leaves are no longer a problem, as they all dropped off. The mid leaves are all burning up too now, it wont be too long until the buds turn brown. Happens every grow, right around week 7.

I'm thinking my soil is slightly high PH this time, around 7.0 (long story--). I've been cutting down on PH down (or up) and am feeding water without PH adjustment at around 6.5-7.0. My soil PH (same soil) got very acidic last grow and I'm watering with a slightly higher PH

Thanks for the help ! I'm almost at the point where I dont care anymore. The over thinking and research is getting me nowhere.
 
J

jonesi daone

New Member
singlecoiled said:
Good stuff, thanks for the tips. You read my mind, I was thinking tap water might be a good idea now that I only have a month to go (give or take). Yes, I think your right, lockout is setting in just as it has for my past three grows. Week 6 is where I fail, hard everytime and nothing seems to get me through safely !

This grow, I've kept it very simple and I am following the Dynagrow feed chart at half strength to 3/4.... Fed around once per week or every two waterings, Watering is around twice a week, 3 days average, I water when the pot feels light and my drainage is very good, I get some runnoff not too much though. Runoff PH is around 6.5-70

I've read that bloom nutrients cause more harm than good, so No Open Sesame, Cha-Ching, Beastie bloomz, this grow.... Just Dynagro Foliage Pro, Bloom (barely used) Mag Pro and Protekt. I have Cal Mag but am using only a small amount....

The Dynagrow feeding schedule below:

(per gallon)
Protekt- 5ML (I feed 2.5 ML)
Foliage Pro- 2.5 ML (I feed around 1.75-2.0 ML)
Bloom- 2.5 ML ( I've only used once, week 5 flower sparingly around 1.75 ML)
Mag Pro- 1.25- (I give just a few drops, I'm talking 1/64th of a tsp per gallon)
Sensi Cal Mag- 1/64th tsp plain waterings... (barely any at all)

Week 6 Flower The Dyna Grow schedule drops the foliage pro and bumps Bloom to 5 ML.

I thought the high use of bloom nutrients caused my problems last grow, so I'm taking it really easy this time. But here I am again, ready to watch my plant start to turn yellow and brown.

No, EC meter yet unfortunately, thats on my list of things to do. I PH using drops and am watering with water in the 6.5 -7.0 range. I'm trying hard this grow to use as little PH up and Down and am hoping the soil buffers the PH to a healthy range.
Click to expand...
You should be cutting out all calmag at beginning of week 7.
 
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